[CHANGELOG] Add latest changes

Author: mpsonntag

CHANGELOG.md

@@ -3,6 +3,13 @@
 Used to document all changes from previous releases and collect changes 
 until the next release.
 
+# Version 1.5.1
+
+# Minor changes and updates
+- Section properties can now be reordered. See PR #398 for details.
+- Property values can now be inserted at a specified index. See PR #398 for details.
+- Tuples can now be assigned using a list instead of the `"(x;x;...)"` syntax as well. See PR #393 and issue #392 for details.
+
 # Version 1.5.0
 
 # Python 2 deprecation warning